Platinum complex
AssigneeGeneral Electric Company
InventorsBruce A. Ashby, Frank J. Modic
Life of this patent
Estimating the term…
Abstract
Platinum complexes of unsaturated siloxanes, substantially free of inorganic halogen and inhibitory compounds, provide superior hydrosilation catalysts when the unsaturated siloxane comprises, per gram-atom of platinum, (i) a combination of one mole of (CH.sub.2 .dbd.CH)((R).sub.2 Si).sub.2 O, and one mole of (CH.sub.2 .dbd.CH) (R).sub.2 SiOSi(R.sub.2)OH; (ii) two moles of (CH.sub.2 .dbd.CH)((R).sub.2 Si).sub.2 O; or (iii) a mixture of (i) and (ii), wherein R is free of aliphatic unsaturation and is selected from alkyl, cycloalkyl, and aryl groups.
Claims10
A platinum-siloxane complex catalyst, substantially free of inhibitory impurities and detectable inorganic halogen, and consisting essentially of
- (i) one gram-atom of chemically combined platinum and one mole each of an organosiloxane of the formula ##STR5## (ii) one gram-atom of chemically combined platinum and two moles of an organosiloxane of the formula ##STR6## (iii) a combination of (i) and (ii);
- wherein R is free of aliphatic unsaturation and is selected from alkyl radicals, cycloalkyl radicals and phenyl radicals.
A curable composition comprising
- (a) an organosilicon compound containing at least one .dbd.SiH bond;
- (b) an organic compound containing an aliphatic unsaturated group, a hydroxyl group, or a mixture of such groups;
- and
- (c) a catalytic amount of a platinum-siloxane complex catalyst
- substantially free of inhibitory impurities and detectable inorganic halogen, and consisting essentially of
- (i) one gram-atom of chemically combined platinum and one mole each of an organosiloxane of the formula ##STR7## (ii) one gram-atom of chemically combined platinum and two moles of an organosiloxane of the formula ##STR8## (iii) a combination of (i) and (ii);
- wherein R is free of aliphatic unsaturation and is selected from alkyl radicals, cycloalkyl radicals and phenyl radicals.
Dependencies are inferred from the claim text.